Cigar lighter



C IGAR LIGHTER 2 sheets-sheet 1 @www C. H. JORGENSEN ET AL March l5,1955 Filed oct. 26, 1949 March 15, 1955 c. H. JORGENSEN ET AL 2,704,318

CIGAR LIGHTER Filed OCb. 26. 1949 2 Sheets-Sheet 2 nvcntors (Zaza/vr'fc/yearn? En @wf/Ya? awww/raf United States Patent O CIGAR LIGHTERClarence H. Jorgensen, East Rochester, and Lawrence C. Dermond,Rochester, N. Y., assignors to General Motors Corporation, Detroit,Mich., a corporation of Delaware Application October 26, 1949, SerialNo. 123,642

11 Claims. (Cl. 219-32) This invention relates generally to electriccigar lighters of the type adapted to be used in vehicles, and moreparticularly to certain improvements in lighters of this type which areautomatic in their operation with a removable igniting unit which ismanually moved to its closed-circuit position and automatically returnedto opencircuit position after the heating element carried by the unithas been brought to incandescence.

One object of the invention is to improve the construction of thethermostatic latch mechanism which retains the igniting unit in itsclosed-circuit position and provide a separate contact arm forcompleting the circuit through the heating element independently of thebimetallic latch fingers.

A further object is to provide a safety device in the form of anautomatic circuit breaker which can be manually reset which is adaptedto open the circuit to the heating element of the lighter upon eitheroverheating thereof or upon a short-circuit or overload.

Other objects are to simplify and improve the construction of variousfeatures of both the lighter and circuit breaker such as will appearfrom the following description of the embodiment with a modified form ofone feature which is illustrated in the accompanying drawings.

Figure 1 is a longitudinal sectional view of the present lighter andcircuit breaker unit.

Fig. 2 is an enlarged sectional view taken substantiali ly on line 2 2of Fig. l.

Fig. 3 is a fragmentary sectional view taken substantially on line 3 3of Fig. l.

Fig. 4 is a fragmentary sectional view of the bimetallic latch andcontact construction taken substantially on line 4 4 of Fig. 2.

Fig. 5 is a detached plan view, partly in section, showing amodification of the bimetallic latch and contact construction.

Fig. 6 is a sectional view of this modification taken substantially online 6 6 of Fig. 5.

Fig. 7 is a sectional view taken substantially on line 7 7 of Fig. 5.

As shown in Fig. 1 the present lighter comprises a tubular case orholder 10 having at its front end a flange 12 adapted to engage thefront face of an instrument panel 14 or other support having an openingthrough which the holder may be mounted with the holder clamped to thissupport by a retainer 16 which is threaded on the rear end of the holderand engages the rear face of the support.

A sleeve 18 which is preferably formed of a sheet brass stamping havinga circular offset base llange 20 and three spaced forwardly extendingarms 22 of arcuate section is slidably mounted within the holder 10. Asshown in Fig. 2 the holder 10 is provided with peripherally spacedopenings 24 between its ends with inwardly bent lugs 26 which extend onopposite sides of the arms 22 to limit relative rotation between thesleeve 18 and holder 10.

The rear end of the holder 10 is formed with an inwardly extendingilange 28 and an ejecting spring 30 is interposed between this flangeand the flange 20 of sleeve 18 to urge the sleeve towards the front endof the holder. The front ends of the arms 22 of the sleeve are offsetinwardly as shown at 32 to be engaged by the removable igniting unit,indicated generally at 34, as will be hereinafter described.

2,704,318 Patented Mar. 15, 1955 The igniting unit or removable plug 34,as it is conventionally termed, is provided with the usual heatingelement 36 at its inner or rear end which consists of a coil ofresistance wire that is welded at one end to a rivet 38 and at its otherend to a metal cup or ferrule 40 which is secured to but insulated fromthe rivet 38 by insulating washers 42. A brass plate 44 and a cupshapedmember 46 are also secured on the rivet 38 and an insulating spacer orplug body 48 may be clamped between the plate 44 and member 46 byspinning over the open end of the member 46 as indicated at 50.

An operating knob and handle 52 is adapted to be secured to the frontend of the plug body 48 in any convenient manner. As shown herein, thebody 48 is provided with an end cap 54 and sleeve nut 56 to receive oneend of the stud 58 with a hollow shell 60 between the end cap and knob52 which is threaded on the other end of stud 58.

Referring now to the thermostatic latch and contact construction whichis located in the base of the holder to cooperate with the removableplug, a hollow cage 62 which extends forwardly within the holder 10 iswelded to the flange 28 of the case and formed with an inwardlyextending flange clamped between insulating washers 64 and 66 on aterminal nut 68. A spacer washer 70 is interposed between washer 66 andthe head of the nut 68 and the diameter of insulating washer 66 is suchthat the periphery thereof will be engaged by the ange 20 of sleeve 18to limit the outward movement of the sleeve by spring 38.

The combined thermostatic latch and contact member, generally indicatedat 72, is riveted on the front end of the terminal nut 68. ln thelightershown in Figs. l to 4 this element is formed entirely of suitablebimetallic material having a central disk portion 74 and three spacedspring fingers or arms. As will be hereinafter described, these arms areadapted to be engaged by the ferrule 40 when the removable plug 34 ismanually moved to a closed-circuit position with the two arms designatedby numeral 76 so formed as to function as resilient latch fingers whilethe third arm 78 is formed to function only as a resilient Contact arm.

Each of the arms 76 and 78 is offset rearwardly and extends outwardlyfrom the disk portion 74 as indicated at 80 in Figs. l and 4, and thearms then extend forwardly and incline inwardly with their free endsbent out as at 82 for suitable engagement by the ferrule 40. As shown inFig. 2 the spacer washer 70 is of substantially triangular shape toaccommodate the rearwardly oiset portions of the arms which may alsoextend outwardly between arms 22 of sleeve 18 and within openings 24 inholder 10.

The end portions of the three arms are arcuately formed to conform tothe periphery of the ferrule 48 and each of the latch arms or fingers 76is provided with an inwardly extending transverse depression or rib 84adjacent its end which is adapted to engage over the ferrule 40. Thecontact arm 78 is not provided with such a transverse rib but is formedwith an inwardly extending contact surface 86 of appreciable width whichis adapted to slidably engage the periphery of the ferrule 40.

In addition to the arms 76 and 78, the member 72 is provided withprojections 88 on the disk portion 74 between the arms with forwardlyextending relatively short flanges 90 on each projection which areadapted to function as stops to be engaged by the ferrule 40 to limitthe inward movement of the removable plug 34.

The removable plug 34 and other parts of the present lighter are shownin Fig. 1 in full lines in the normal storage or open-circuit positionin which the plug is resiliently retained against accidentaldisplacement by peripherally spaced inwardly bent spring detents on theholder 10 such as shown at 92 which have outwardly bent ends to engage aange 94 on the plug body 48.

When it is desired to use the lighter the plug 34 is manually pushedrearwardly Within the holder 10 to the closed-circuit position in whichonly certain parts have been shown in dot-and-dash lines in Fig. l.During this movement of the plug 34, the sleeve 18 will be movedrearwardly to compress spring 30 and the ferrule 40 will engage the bentends of the resilient latch lingers 76 ICC and resilient contact arm 78and force them outwardly until the ribs 84 of fingers 76 engage over theferrule 40.

It will be understood by those familiar with this art that thebimetallic latch lingers 76 are adapted to gradually expand or moveoutwardly as they are heated by heat from the heating coil 36 duringcnergization thereof and the resiliency and rate of movement of thesefingers is such that they will grip and retain the ferrule 40 and plug34 against return movement by the ejecting spring 30 until the heatingcoil has attained some predetermined temperature at which the spring 30will overcome the friction between the ferrule and fingers and returnthe plug to the open-circuit or storage position from which it may bewithdrawn for use.

An important feature of the present lighter is the provision of theresilient contact arm 78 to complete the energizing circuit to theheating coil 36 independently of the latch fingers 76. As previouslydescribed, this contact arm 78 is formed with a relatively wide contactsurface 86 which is adatped to slidably engage the periphery of theferrule 40. Since this arm is bimetallic it will be subject to someexpansion when heated but it is initially tensioned inwardly to such agreater extent than the latch fingers that the contact surface 86 willbe maintained in resilient engagement with the ferrule 40 whenever theplug is moved to closed-circuit position until the plug is returned tothe storage position by the ejecting spring 30 in the manner heretoforedescribed.

The contact arm 78 is also preferably so formed that the bent endthereof will be engaged by the ferrule 40 to complete the circuit to theheating coil as the plug is moved inwardly before the ferrule engagesthe bent ends of the latch fingers, and during the automatic returnmovement of the lighter after the heating coil has attained the desiredtemperature the ferrule will disengage the latching ribs 84 of theexpanded latch lingers before the circuit is opened between the ferruleand contact arm.

From the foregoing it will be apparent that the latch fingers 76 neverfunction as circuit making or circuit breaking contacts and there willconsequently be no destructive arcing between the ferrule 40 and thelatch fingers such as has been found to occur in prior lighterconstructions wherein the latch fingers also function as contacts forinitially making the energizing circuit to the heating element at thebeginning of the heating cycle and for breaking the circuit at the endof the cycle.

Although the circuit for the heating element should be obvious from theshowing in Fig. 1 it should perhaps be noted that during theenergization thereof, the current is conducted from the terminal nut 68,which is connected to a source of current in the manner to behereinafter described, through the contact arm 78 and ferrule 40 to theouter end of heating coil 36, and from the inner end of this coilthrough rivet 38, plate 44, and sleeve 18 to the holder 10 which may begrounded through the panel 14 or through some other suitable groundconnection.

Referring now to the modification shown in Figs. to 7, the terminal nut100 corresponds to the terminal nut 68 and the general configuration ofthe bimetallic latch and contact construction is quite similar to thatpreviously described. Instead of being formed entirely of bimetallicmaterial, this material is used only for a single latch linger and twocontact arms are provided by a separate member which may consist of asuitable conducting material such as phosphor bronze. This separatemember is generally indicated at 102 with the bimetallic member to formthe latch finger generally indicated at 104 and these members are shownas riveted on the terminal nut 100.

The member 102 is formed with a substantially fiat central portionhaving two spaced forwardly extending spring contact arms 106 with theirfree ends bent out for engagement by the ferrule and with elongatedcontact surfaces 108 adapted to resiliently engage the periphery of theferrule around the heating element of the lighter plug whenever the plugis moved to and retained in its closed-circuit position. The member 102is also formed with the projections 110 having forwardly extendingrelatively short flanges 112 corresponding to the previously describedflanges 90 adapted to function as stops to limit the inward movement ofthe plug.

The member 104 may be conveniently and economically formed of a singlestraight strip of bimetal having an opening 114 to receive a positioninglug 116 on member 102 with a forwardly extending spring latch finger 118having an inwardly extending rib 120 and a bent out end to function in amanner similar to that described heretofore with reference to the latchfingers 76. Both the latch finger 118 and contact arms 106 have the endportions thereof arcuately formed to engage the circular ferrule asinthe prior construction.

In this modification the operation of the latch and contact constructionis generally similar to that of the entirely bimetallic constructionheretofore described in that the latch finger 118 does not functionprimarily as a contact but the circuit is always closed or opened byengagement between the ferrule and the contact arms 106 which are,however, not of bimetallic material in this modification so there is notendency for these arms to expand outwardly when heated uponenergization of the heating element and they can be designed to engagethe ferrule around the heating element with a uniform pressure at alltimes that the plug is in the closed-circuit position.

Referring again to the showing in Fig. 1 and to the detail section inFig. 3, the present lighter construction incorporates an automaticcircuit breaker which is interposed between the source of current andthe terminal nut 68. A terminal screw 122 which is threaded into the nut68 is adapted to secure a birnetallic latch 124 within the hollow rearend of the previously described cage 62. The latch 124 may be clamped bythe terminal screw between washers 126 and a spacer washer 128 whichengages the insulating washer 64 with a positioning notch in washer 128to receive a bent end 130 on the latch.

The latch 124 extends rearwardly within the cage 62 and is formed withan inwardly bent rib 132 which is adapted to resiliently engage aroundthe rear edge of a contactor 134 which is riveted on the inner end of apush rod 136. This push rod is slidably carried in a bearing 138 whichis mounted by means of an insulating cover plate 140 at the rear end ofthe cage 62. Both the plate 140 and a spring blade contact 142 areclamped on the bearing 138 by spinning over the front end of thisbearing and the blade contact 142 extends forwardly to resilientlyengage the periphery of the contactor 134. A spring 144 is interposedbetween the rear side of the bearing 138 and a head 146 on the rear endof the push rod 136 and an elongated shield 148 having an externalinsulating sleeve with the front end of the shield axially slit to befrictionally engaged over the rear end of the bearing 138 encloses thespring and rear portion of the push rod.

The closed rear end of the shield 148 is adapted to be engaged by asuitable terminal 152 on the end of the current supply cable 154 whichis urged forwardly by a spring 156 between insulating disk 158 and aninsulating collar 160 on the terminal 152. The terminal and itsassociated parts may be located within a suitable housing 162 which isdetachably secured by a bayonet slot connection at 164 to a connector166 with both the connector and cover plate 140 clamped to the cage 62by crimping portions of the rear edge of the cage over the periphery ofthe connector 166.

With reference to the operation of the above described circuit breakerconstruction, the several parts thereof have been shown in full lines intheir normal position to complete a circuit from the supply cable to theterminal screw and terminal nut 68 of the lighter per se. In thisposition it will be seen that current is conducted from the terminal 152through the shield 148 and bearing 138 to spring contact 142, tocontactor 134 on push rod 136 and then through the bimetallc latch 124to the terminal screw 122. Although current could be conducted from theshield 148 through bearing 138 to the rod 136 or through the spring 144to this rod, it is preferable to provide the spring blade contact 142 toinsure a more positive current path from the shield and bearing directlyto the contactor 134, and to prevent voltage drop due to eithercorrosion or oxidation of the contact surfaces of the spring contact142, contactor 134, and bimetallic latch 124, it has been founddesirable to plate these elements or at least the contact surfacesthereof with a relatively thin coating of silver.

As noted among the several objects of the present invention, the circuitbreaker is incorporated in our lighter construction to open the circuitto the heating element of the lighter upon either overheating thereof orupon a short-circuit or overload in the circuit. In the constructionshown herein, it will be apparent that the spring genesis 144 exerts arearward force on the push rod 136 but movement of the push rod isnormally prevented by the engagement of the end of the bimetallic latch124 with the contactor 134. Since the bimetallic latch is mounted on theterminal screw 122 some heat from the heating coil 36 when energizedwill be transmitted to the latch through the terminal nut 68 and screw122 and since the bimetallic latch is in the circuit to the heatinglcoil and is of such material as to offer some resistance to the passageof current therethrough it will also be subject to internal heating.

As the bimetallic latch 124 is heated it will gradually expand or moveoutwardly from the contactor 134 and at some predetermined temperaturethe spring 144 will overcome the friction between the contactor andlatch and move the push rod rearwardly to the position shown indot-and-dash lines in Fig. l to open the circuit. To operate as a safetydevice the bimetallic latch should be so constructed that it will not besufficiently heated during normal operation of the lighter to releasethe push rod but will release the same if either the heating coil of thelighter reaches a dangerous degree of temperature which is above thatdesired for normal use such as may occur if the circuit through theheating coil is maintained for an excessive period by the plug beingmanually held in closed-circuit position or by failure of the plug toautomatically return to its storage position during normal operation, orif the current passing through the circuit be subject to an overload asfrom a short circuit in the heating coil or for other reasons.

In actual practice, lighter units constructed in accordance with thepresent showing have been designed for the circuit to carry a load of to20 amperes during normal operation and for the heating coil to attainthe desired temperature for use and the plug automatically returned toits storage position within about l() seconds after being manuallyoperated to its closed-circuit position. The latching tension anddimensions of the circuit breaker latch have been so designed that ifthe circuit through the heating coil is maintained for a period of about55 seconds the bimetallic latch will be sufliciently heated by both heatfrom the heating coil and internal resistance to release the push rod136 and break the energizing circuit. If, however, the circuit issubject to an overload of about 30 amperes which represents the effectof a short circuit, the bimetallic latch will be heated to such anextent by its internal resistance to the passage of this higher amperagethat it will release the push rod to break the circuit in approximatelyseconds.

It will be apparent that after the circuit has been opened by thecircuit breaker, the bimetallic latch 124 will cool off and return to alatching position and after the abnormal condition which caused thecircuit breaker to open has been determined and any necessary repairsmade to remedy this condition, the circuit breaker can be readily resetto again close the circuit therethrough by first removing both thehousing 162 with the enclosed terminal parts and the shield 148 and thenmanually depressing the push rod 136 until the contactor 134 is engagedand latched by the bimetallic latch 124 after which the shield andhousing may, of course, be returned to their original positions.

In describing the construction of the present circuit breaker it wasnoted that at least the contact surfaces of contact 142, contactor 17,34and bimetallic latch 124 are preferably silver plated to prevent voltagedrop due to corrosion or oxidation. It has been found that under certainconditions Stich as prolonged or continued use at above normal orexcessive temperature of the heating coil there is a tendency for thecontacting surfaces of the bimetallic latch fingers and contact arms ofsome lighters to oxidize or scale and it is contemplated that the member72 or the contacting surfaces of the arms 76 and 78 thereof and thecorresponding parts in the modification of Figs. 5 to 7 may be plated orcoated with a relatively thin layer of silver or nickel which have bothbeen found in actual practice t0 reduce or entirely eliminate thistendency.

It is believed that the many features and advantages of the presentconstruction of both the lighter and the circuit breaker incorporatedtherein will be obvious from the foregoing detailed description, and itwill be apparent that various modifications and changes may be madewithin the scope of the present invention as defined by the claimsappended hereto.

We claim:

1. In a cigar lighter, a tubular holder, a removable igniting unitslidably mounted in said holder and projecting outwardly from the frontend thereof, said unit having an electrically conducting surface portionlying in a plane generally transverse to the direction of slidablemovement ot' the unit, a thermostatic latch mounted within said holderadjacent the rear end thereof, an electrically conducting sleeveslidably mounted in said holder with the front end of said sleeve sopositioned as to engage said surface in pressure abutting relation tomake positive electrical contact between the sleeve and surface, and aspring interposed between the rear end of said sleeve and said holder tonormally hold said unit in spaced relation to said thermostatic latch.

2. In a cigar lighter, a tubular holder, a removable igniting unitslidably mounted in said holder and projecting outwardly from the frontend thereof, said unit having an electrically conducting surface portionlying in a plane generally transverse to the direction of slidablemovenient of the unit, a thermostatic latch mounted within said holderadjacent the rear end thereof, an electrically conducting sleeveslidably mounted in said holder with the front end of said sleeve sopositioned as to engage said surface in pressure abutting relation tomake positive electrical contact between the sleeve and surface, aspring interposed between the rear end of said sleeve and said holder tonormally hold said unit outwardly in spaced relation to saidthermostatic latch, and yieldable means on said holder to engage ashoulder on said unit and normally limit the outward movement of saidunit relative to said thermostatic latch. 3.. In a cigar lighter, atubular holder, a removable igniting unit slidably mounted in saidholder and projecting outwardly from the front end thereof, athermostatic latch mounted within said holder adjacent the rear endthereof, a peripheral flange on said unit adjacent the inner end thereofproviding an electrically conducting surface portion lying in a planegenerally transverse to the direction ot' slidable movement of the unit,an electrically conducting sleeve slidably mounted in said holder withthe front end of said sleeve so positioned as to abut said surface tomake pressure abutting contact between the sleeve and surface, a springinterposed between the rear end of said sleeve and said holder tonormally hold said unit outwardly in spaced relation to saidthermostatic latch, and spring detents on said holder to engage the saidange on the unit to normally limit the outward movement o f said unitrelative to said thermostatic latch.

4. Iii a cigar lighter, a holder, a manually removable plug slidablymounted in said holder and movable` n a path longitudinal of saidholder, yielding means opposing rearward movement of said plug in theholder, a heating element on said plug having an annular ferrule, acornbined thermostatic latch and contact member mounted in said holder,said member including a thermostatic latch arm mounted in the path ofmovement of the ferrule for electrical engagement therewith when theplug is moved rearwardly in the holder, said member also including acontact arm in the path of movement of the ferrule for electricalengagement therewith when the plug is moved rearwardly in the holder,said contact arm being of greater length than the latch arm to close anenergizing circuit through said heating element prior to the electricengagement of said latch arm with said ferrule, said thermostatic latcharm being adapted to engage the ferrule and hold the ferrule and contactarm in engagement against the pressure of the yielding means until theheating element attains a predetermined temperature sufficient torelease said thermostatic latch, and electric energizing means ofaforesaid heating element.

5. In a cigar lighter as defined in claim 4 in which said combinedthermostatic latch and contact member comprises a bi-metallic material.

6. In a cigar lighter as dened in claim 4 in which said thermostaticlatch arm is a bi-metallic material and said contact arm is amono-metallic material.

7. In a cigar lighter of the automatic type having a holder in which aremovable plug having a heating element with an annular ferrule isadapted to be normally stored, and manually forced rearwardly againstthe pressure o f an ejecting spring in said holder when desired toenergize the heating element until it attains a predeterminedtemperature, a contact arm mounted in said holder and having a widecontact surface of substantial contact area to frictionally engage theferrule of the heating element to close an energizing circuit throughthe heating element, a thermally responsive latch arm mounted in saidholder rearwardly of said contact arm and having a rib of lesser contactarea than said contact surface to latch over the fcrrule and hold theplug against return to storage position by the ejecting spring until theheating element has attained the desired predetermined temperature, andelectrical energizing means for said heating element.

8. In a cigar lighter of the automatic type having a holder in which aremovable plug having a heating element with an annular ferrule isadapted to be normally stored and manually forced rearwardly against thepressure of an ejecting spring in said holder when desired, to energizethe heating element until it attains a prede termined temperature, acombined thermostatic latch and Contact member mounted in said holderadjacent the inner end thereof and having a central disk-shaped portionwith a plurality of flexible arms extending forwardly therefromincluding a contact arm having an elongated contact surface ofsubstantial contact area to frictionally engage the annular ferrule ofthe heating element, a thermally responsive latch arm having a rib oflesser contact area than said contact surface to frictionally engage theannular ferrule after engagement thereof by the contact surface of saidcontact arm and relatively short spaced flanges extending forwardly fromsaid central portion of the latch and contact member so as to be engagedby the ferrule to limit the rearward movement of the plug in the holder,and electrical energizing means for said heating element.

9. In a cigar lighter having a holder in which a removable igniter plugis adapted to be received and be manually moved to engage a contact armand energize the heating element to normally attain a predeterminedtemperature, a terminal in said holder for mounting the Contact arm, acircuit breaker including a movable contactor extending rearwardly fromsaid terminal and connected to a source of current in series with saidcontact arm, a thermally responsive latch arm having one end secured tosaid terminal and the other end in the path of movement of saidcontactor and engageable with said contactor to conduct currenttherefrom to said terminal, spring means to urge said contactor awayfrom said latch arm, said latch arm being operative to hold saidcontactor in latched position in engagement with said arm and said latcharm being movable in response to heat from the heating element above apredetermined temperature to release said contactor to open theenergizing circuit to the heating element, and an electrical energizingcircuit for said heating element.

l0. In a cigar lighter having a holder in which a removable igniter plughaving a heating element is adapted to be received and be manually movedinto engagement with a contact arm so as to energize the heating elementto normally attain a predetermined temperature, an automatic circuitbreaker mounted in said holder and including a movable contactorextending rearwardly of said contact arm in series circuit therewith, athermally responsive latch mounted in the path of. movement of saidcontactor and adapted to engage sald contactor to complete a circuitthrough said latch to the contact arm, said latch being movable inresponse to an overload in the circuit or excessive temperature of theheating element to permit separation of the contactor therefrom to openthe circuit to the contact arm, means for moving the contactor out ofengagement with the latch when the temperature thereof reaches apredetermlned degree, and electrical energizing means for said heatingelement.

11. In a cigar lighter having a holder in which a removable igniter plughaving a heating element is adapted to be received and manually movedinto position to be heated, a contact arm engaging the igniter when insuch position so as to energize the heating element to normally attain apredetermined temperature, an automatic circuit breaker mounted on saidholder adjacent the inner end thereof and including a bi-metallic latchhaving one end electrically connected to said contact arm and the otherend in the path of movement of and normally 1n latching engagement witha contactor on the end of a push rod which is slidably mounted formovement relative to said bi-metallic latch, spring means on said rodnormally exerting a pressure thereon to effect disengagement of thecontactor from the latch and effective when the latch reaches apredetermined temperature, electrical energizing means for said heatingelement including a conductor leading to a source of current, and meansto connect said conductor to the contactor through the bimetallic latch,so that current is normally carried to the contactor arm through saidlatch.

References Cited in the le of this patent UNITED STATES PATENTS2,128,017 Sinko Aug. 23, 1938 2,129,792 Sinko Sept. 13, 1938 2,140,311Cohen Dec. 13, 1938 2,180,703 Carissimi Nov. 2l, 1939 2,201,952 CohenMay 2l, 1940 2,228,851 Schmelz Jan. 14, 1941 2,248,407 Johnson July 8,1941 2,251,611 Johnson Aug. 5, 1941 2,267,011 Ashton Dec. 23, 19412,301,129 Lehmann Nov. 3, 1942 2,302,775 Johnson Nov. 24, 1942 2,381,726Davis Aug. 7, 1945 2,458,804 Sundt Jan. 11, 1949 2,458,807 Tucker Jan.11, 1949 2,485,736 Ingwersen Oct. 25, 1949 2,486,366 Youhouse Oct. 25,1949 2,505,328 Jackson Apr. 25, 1950

